<template>
  <div>
    <div
      v-show="model"
      class="model"
      @click="model = false"
    >
      <div class="model-show">
        <img
          :src="modelSrc"
          alt=""
        >
      </div>
    </div>
    <div class="cut">
      <vueCropper
        ref="cropper"
        :img="option.img"
        :fixed="option.fixed"
        :fixed-number="option.fixedNumber"
        :output-size="option.size"
        :output-type="option.outputType"
        :info="true"
        :full="option.full"
        :can-move="option.canMove"
        :can-move-box="option.canMoveBox"
        :fixed-box="option.fixedBox"
        :original="option.original"
        :auto-crop="option.autoCrop"
        :auto-crop-width="option.autoCropWidth"
        :auto-crop-height="option.autoCropHeight"
        :center-box="option.centerBox"
        :high="option.high"
        @real-time="realTime"
        @img-load="imgLoad"
      />
    </div>
    <!-- <div class="show-preview" :style="{'width': previews.w + 'px', 'height': previews.h + 'px',  'overflow': 'hidden', 'margin': '5px'}">
      <div :style="previews.div">
        <img :src="previews.url" :style="previews.img">
      </div>
    </div> -->
    <div class="test-button">
      <label
        class="btn"
        for="uploads"
        style="background-color:#67C23A;border-color:#67C23A;"
      >
        <span class="svg-container">
          <svg-icon icon-class="my-select" />
        </span>
        更换图片
      </label>
      <input
        id="uploads"
        type="file"
        style="position:absolute; clip:rect(0 0 0 0);"
        accept="image/png, image/jpeg, image/gif, image/jpg"
        @change="uploadImg($event, 1)"
      >
      <button
        v-if="!crap"
        class="btn"
        @click="startCrop"
      >
        <span class="svg-container">
          <svg-icon icon-class="my-start" />
        </span>
        开始截图
      </button>
      <button
        v-else
        class="btn"
        @click="stopCrop"
      >
        <span class="svg-container">
          <svg-icon icon-class="my-stop" />
        </span>
        停止截图
      </button>
      <button
        class="btn"
        @click="clearCrop"
      >
        <span class="svg-container">
          <svg-icon icon-class="my-clear" />
        </span>
        清除截图
      </button>
      <button
        class="btn"
        @click="refreshCrop"
      >
        <i class="el-icon-refresh" />
        刷新
      </button>
      <button
        class="btn"
        @click="changeScale(1)"
      >
        <span class="svg-container">
          <svg-icon icon-class="my-fangda" />
        </span>
        放大
      </button>
      <button
        class="btn"
        @click="changeScale(-1)"
      >
        <span class="svg-container">
          <svg-icon icon-class="my-suoxiao" />
        </span>
        缩小
      </button>
      <button
        class="btn"
        @click="rotateLeft"
      >
        <span class="svg-container">
          <svg-icon icon-class="my-rotate-right" />
        </span>
        逆时针旋转
      </button>
      <button
        class="btn"
        @click="rotateRight"
      >
        <span class="svg-container">
          <svg-icon icon-class="my-rotate-left" />
        </span>
        顺时针旋转
      </button>
      <button
        class="btn"
        @click="finish('base64')"
      >
        <i class="el-icon-picture" />
        浏览(base64)
      </button>
      <!-- <button @click="finish('blob')" class="btn">preview(blob)</button> -->
      <!-- <a @click="down('base64')" class="btn">download(base64)</a>
      <a @click="down('blob')" class="btn">download(blob)</a> -->
    </div>
  </div>
</template>

<script>
/**
 * 文档：https://www.npmjs.com/package/vue-cropper/v/0.4.7
 */
import { VueCropper } from 'vue-cropper'
export default {
  components: {
    VueCropper
  },
  filters: {},
  props: {
    initimg: {
      type: String,
      default: ''
    },
    setOption: {
      type: Object,
      default() {
        return {}
      }
    }
  },
  data() {
    return {
      model: false,
      modelSrc: '',
      crap: false,
      previews: {},
      // lists: [
      //   {
      //     img: 'https://qn-qn-kibey-static-cdn.app-echo.com/goodboy-weixin.PNG'
      //   },
      //   {
      //     img: 'https://avatars2.githubusercontent.com/u/15681693?s=460&v=4'
      //   }
      // ],
      option: {},
      show: true
    }
  },
  computed: {},
  watch: {
    // initimg: {
    //   deep: true,
    //   handler(newVal, oldVal) {
    //     console.log('--- change initimg ---')
    //     console.log(newVal)
    //     this.option.img = newVal
    //     // this.setOptions = _.extend({}, this.setOptions, newVal)
    //     // this.initChart()
    //   }
    // }
  },
  mounted() {},
  created() {
    this.option = Object.assign({
      img: '', //img
      size: 1, //裁剪生成图片的质量
      full: true, //是否输出原图比例的截图
      outputType: 'png', //裁剪生成图片的格式
      canMove: true, //上传图片是否可以移动
      fixedBox: false, //固定截图框大小 不允许改变
      fixed: false, // 是否开启截图框宽高固定比例
      fixedNumber: [1, 1], //截图框的宽高比例
      original: false,
      canMoveBox: true, //截图框能否拖动
      autoCrop: true, //是否默认生成截图框
      // 只有自动截图开启 宽度高度才生效
      autoCropWidth: 200,
      autoCropHeight: 200,
      centerBox: true, //截图框是否被限制在图片里面
      high: true
    }, this.setOption)
    this.option.img = this.initimg
  },
  methods: {
    startCrop() {
      // start
      this.crap = true
      this.$refs.cropper.startCrop()
    },
    stopCrop() {
      //  stop
      this.crap = false
      this.$refs.cropper.stopCrop()
    },
    clearCrop() {
      // clear
      this.$refs.cropper.clearCrop()
    },
    refreshCrop() {
      // clear
      this.$refs.cropper.refresh()
    },
    changeScale(num) {
      num = num || 1
      this.$refs.cropper.changeScale(num)
    },
    rotateLeft() {
      this.$refs.cropper.rotateLeft()
    },
    rotateRight() {
      this.$refs.cropper.rotateRight()
    },
    finish(type) {
      // 输出
      // var test = window.open('about:blank')
      // test.document.body.innerHTML = '图片生成中..'
      if (type === 'blob') {
        this.$refs.cropper.getCropBlob((data) => {
          // console.log(data)
          var img = window.URL.createObjectURL(data)
          this.model = true
          this.modelSrc = img
        })
      } else {
        this.$refs.cropper.getCropData((data) => {
          // console.log(data)
          this.model = true
          this.modelSrc = data
        })
      }
    },
    // 实时预览函数
    realTime(data) {
      this.previews = data
      // console.log(data)
    },

    finish2(type) {
      this.$refs.cropper2.getCropData((data) => {
        this.model = true
        this.modelSrc = data
      })
    },
    finish3(type) {
      this.$refs.cropper3.getCropData((data) => {
        this.model = true
        this.modelSrc = data
      })
    },
    down(type) {
      // event.preventDefault()
      var aLink = document.createElement('a')
      aLink.download = 'demo'
      // 输出
      if (type === 'blob') {
        this.$refs.cropper.getCropBlob((data) => {
          this.downImg = window.URL.createObjectURL(data)
          aLink.href = window.URL.createObjectURL(data)
          aLink.click()
        })
      } else {
        this.$refs.cropper.getCropData((data) => {
          this.downImg = data
          aLink.href = data
          aLink.click()
        })
      }
    },
    uploadImg(e, num) {
      //上传图片
      // this.option.img
      var file = e.target.files[0]
      if (!/\.(gif|jpg|jpeg|png|bmp|GIF|JPG|PNG)$/.test(e.target.value)) {
        alert('图片类型必须是.gif,jpeg,jpg,png,bmp中的一种')
        return false
      }
      var reader = new FileReader()
      reader.onload = (e) => {
        let data
        if (typeof e.target.result === 'object') {
          // 把Array Buffer转化为blob 如果是base64不需要
          data = window.URL.createObjectURL(new Blob([e.target.result]))
        } else {
          data = e.target.result
        }
        if (num === 1) {
          this.option.img = data
        } else if (num === 2) {
          this.example2.img = data
        }
      }
      // 转化为base64
      // reader.readAsDataURL(file)
      // 转化为blob
      reader.readAsArrayBuffer(file)
    },
    imgLoad(msg) {
      // console.log(msg)
    }
  }
}
</script>

<style rel="stylesheet/scss" lang="scss" scoped>
* {
  margin: 0;
  padding: 0;
}

.cut {
  width: 100%;
  height: 500px;
  // margin: 30px auto;
}

.c-item {
  max-width: 800px;
  margin: 10px auto;
  margin-top: 20px;
}

.content {
  margin: auto;
  max-width: 1200px;
  margin-bottom: 100px;
}

.test-button {
  display: flex;
  flex-wrap: wrap;
  align-content: center;
  justify-content: center;
}

.btn {
  display: inline-block;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  background: #fff;
  border: 1px solid #c0ccda;
  color: #1f2d3d;
  text-align: center;
  box-sizing: border-box;
  outline: none;
  margin:20px 10px 0px 0px;
  padding: 9px 15px;
  font-size: 14px;
  border-radius: 4px;
  color: #fff;
  background-color: #50bfff;
  border-color: #50bfff;
  transition: all .2s ease;
  text-decoration: none;
  user-select: none;
  > span{
    font-size: 16px;
  }
}

.des {
  line-height: 30px;
}

code.language-html {
  padding: 10px 20px;
  margin: 10px 0px;
  display: block;
  background-color: #333;
  color: #fff;
  overflow-x: auto;
  font-family: Consolas, Monaco, Droid, Sans, Mono, Source, Code, Pro, Menlo, Lucida, Sans, Type, Writer, Ubuntu, Mono;
  border-radius: 5px;
  white-space: pre;
}

.show-info {
  margin-bottom: 50px;
}

.show-info h2 {
  line-height: 50px;
}

/*.title, .title:hover, .title-focus, .title:visited {
  color: black;
}*/

.title {
  display: block;
  text-decoration: none;
  text-align: center;
  line-height: 1.5;
  margin: 20px 0px;
  background-image: -webkit-linear-gradient(left,#3498db,#f47920 10%,#d71345 20%,#f7acbc 30%,#ffd400 40%,#3498db 50%,#f47920 60%,#d71345 70%,#f7acbc 80%,#ffd400 90%,#3498db);
  color: transparent;
  -webkit-background-clip: text;
  background-size: 200% 100%;
  animation: slide 5s infinite linear;
  font-size: 40px;
}

.test {
  height: 500px;
}

.model {
  position: fixed;
  z-index: 10;
  width: 100vw;
  height: 100vh;
  overflow: auto;
  top: 0;
  left: 0;
  background: rgba(0, 0, 0, 0.3);
}

.model-show {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100vw;
  height: 100vh;
}

.model img {
  display: block;
  margin: auto;
  max-width: 80%;
  user-select: none;
  background-position: 0px 0px, 10px 10px;
  background-size: 20px 20px;
  background-image: linear-gradient(45deg, #eee 25%, transparent 25%, transparent 75%, #eee 75%, #eee 100%),linear-gradient(45deg, #eee 25%, white 25%, white 75%, #eee 75%, #eee 100%);
}

.c-item {
  display: block;
  user-select: none;
}

@keyframes slide {
  0%  {
    background-position: 0 0;
  }
  100% {
    background-position: -100% 0;
  }
}

</style>
